Slope stability conditions of Monte Mario urban park in Rome, Italy

The present paper deals with slope stability conditions of Monte Mario urban park in Rome. These slopes are mantled by colluvial deposits whose characteristics are scarcely differentiated from those of the corresponding bedrock units. Surveyed landforms show a slope dynamic related to different types of slope movements: falls of blocks and loose materials, rotational slides, earth flows and colluvium translational slides that have to be considered very widespread; small dimensions characterise these slope movements. A concentration of slope instability phenomena has been surveyed in areas where human activities had been performed or in the surroundings. Slope stability analyses show that unstable areas are located in the medium-upper part of Monte Mario bedrock Unit, above and below sandstone strata. Moreover colluvial deposits become prone to sliding when perched water table and downslope seepage occur as a consequence of intense rainfall